Temperature-limiting heater



F. J. POSTEL TEMPERATURE LIMITING HEATER Patented 14,

' i FRED 0'. some; oFjonIoAGo, ni InoIs; 1

I "TEMPERAiURm I MITm ATER.

1 A p i n e pri 3 ,1920; 'sem1' No. 378,002." a i' To all whom it may conceimr r Be it knownthat1E, FRED "J, PosTnn, citizen *of um United States, zriesiding xat" Chi cargo; in the co-unty iof Cook andQSta te of Illinois, have I invented eertain new and useful Improvements in a Temperature-Limiting'I-Ie'ater and ,I- doflherebyJdecIarethe following to be *a fulhlelear', and exact description of the inventionflsuch.aswill: en-i' able otherssk'illed in the ante. whieh'itappertains tomake and use the same. I v a In its; general aspects; my invention-relates to heating appliances and aims to pr'o-' vide methods and meansnwherebyithe efleev "tive heating can easily-and positively be limited to some predetermined temperature below that whieh' might be directly obtain-i "able .from the source of heat. Eor this'gen- .eral, purpose, inyvinvention aims to} provide f simple; easily installed, and entirelyf; auto;

" matic. intermediary means betweenthesourece ajmanner that it willnor mally be highly I effective in transferring heat fromfthesource ,lof the'latter to the objectfwhiclristo be of heat and the object; Whichis to be heated,

to arrange the intermediary means in such li ated, and'to'provideautomatic means for i rendering the vintermediary means inoperative}, as .touthe transferring of heat: above a predetermined temperature. Furthermore,

my invention aims to provide simple (means for controlling the predeterminedtempera- -ture to 'w'hieh the heatingieffeet ion the objcit is to be limited, and to provide means filiqluid is' carriedbe'yonfd a-predetermined -.autom atically responsive to the attained temperature," of @the heated l'object for eonftr'olling the supply of the heat. '1 a A y I vIn'. many classes ofmanufacturingu-fas Well :asIin hydro-therapeutics, it isgnece-ssary to heat objects (such "(as certain classes a of liquids) to given temperatures and it is highly important thatthese temperatures.should p 7 exampleto a" shower head5. According to not be materially exceeded; For example,

I in certain chemical operations the result will be materially altered."ittheheating of the '11ydro-therapeutie treatments; the ,e'fiect on I I I 3 the patient may-be disastrous if the/heating 5o is carried beyond a given temperature, I

a the supply of I heat. a O

mos'tatie arrangements can be made tOySeTVG this 'purposeni'e'ely,".but impurities in the liquid sometimes clogYthe mechanismfused these drawings, a ,1 ia F g.; 1 "1s a diagrammatm view showing an for this purpose and even a slight deposit rdinarily, sue-h therofscale 'may so derangefl suioh a controlling many valuable batches-vo-fjliquids' have been spoiledinthlsiwaiy '1'I1 manufacturing, procvalves has often caused a" painful scalding off the p atientsor even a k lling of the latter. j To avoidsuclrilnsliapsy my'invention aims to. provid'ez'a heating apparatus and wheatsing method in {which the heatiis efiectively transferred from the source to the liquid or other} objeoti which is to be heated by means i ne ehanismgas'to permit an excessive tenr perature; to: be; attained; :Consequently,.

esses; While in;the oaseof;hydro-therapeutic appliances a derangement of the controlling which, are arranged, so as to maintaintheir aims to, accomplish further obj eots Ewhieli will appear vfrom the following specification effective heat-transferring operationqonly up i to some predeterminedtemperature; It also and'from theaccompanyingdrawings. In

apparatus employing my invent-ion and arranged "for heating the supply of aterto a shower bath.

Fig. 2 isa vertical section through arr ap-.

the arnangements fforf normally v .controlling :the supply of heat and for varying the obtainable predeterminedtemperature;

z I1I-Qthesimplified diagra mnatio view of by a fluid in' a pipe passi'ng through this perms for this same purpose,- showing also "tank; so as to furnish hot Water through the outlet pipe for any desired PHIPOSGyLSfOli dangerously high point. To avoidsuch an tank-) Idireetly; to the source of steam, but

oecurrence'fl do not-connect the heating ele-n I .ment; (here shown-as as nglepipe portion 1 a extendmgtransversely through:the heating l :convey the heatfrom the supply ofsteam to;

ing surfaces tliaii avould be secured With liquid throughvertical tubes; extending" through 'perforations'in these two heads, 1 v Likewise, I may circulate the intermediary botton'i to the top of the tank. However, 1 While I have illustrated suchfeatures of a .practic-al embodimentof my invention in the straight loop pipe portions shown in the diagram ofFig. 1; For example, I may in troduce thesteam from the inlet 6 between heads 1.5 disposed across theprimary heater drum 8 and'may circulate the intermediary liquid between heads 17 disposed across the hot Water tank 1 and connected by tubes, 18 throughwhich the Water will passjfro'mthe vFig. 2, I do not Wish to belimited to'thedetails of the construction and; arrangement here disclosed, nor to the employmentiof any particular liquids nor to ,the =,use of my method and appliance for any; particular purpose; Obviously, both; the purpose and the limiting temperature may readily-be va ried, Wl1llQ numerous additions, omissions I claim as myinvention z- Y 1. A device for heating a liq'uld to determined temperature below its boiling point, including in combination with a source of heat, an endless tubular liquid re- 'ceiving member having a part to receive heat from said source and a part to conduct For example,

a pres tially at the said predetermined temperature, an expansion tank freely open to the air and communicating y with the endless liquid receiving member,-:and a layer of oil on the surface of the liquid in the tank for normally forming an air seal to prevent heat to the firstnamed liquid, ,a. liquid. in said member rapidly vaporizable substan 6V ElpO12Itl011,tl16 oil being unaffected by the liquid and adapted to permit the vaporized liquid to escape to the open air and thereby permanently interrupt the operative connection'betvveen the source of heat and the first named liquid so as to prevent heating of said liquid beyond the predetermined temperature.

2. A device for" heating aliquid toa predetermined temperature below its boiling point, including in combination. with a source ofheat, an endlesstubular liquid re- 7 ceiving member having a part to receive heat from said source and a partto conduct heat to the first named liquid, a'liquid in said member rapidly vaporizable' substantially at the said predeterminedtemperature, and a liquid seal interposed between'the liquid and theouter air to permit the vaporized liquid upon exceeding saidtemperature to escape to the open air,;whereby topermanently in-v terrupt the operative connectionbetween the source of heat and the first named liquid to'be heated, so asto prevent heating of said liquid beyond'the predetermined temperature.

Signed a Chicago, Illinois, April 27 FRED JQJPOSTEL. r 

